Annunciator



Dec. 21 11526. 1,611,823

V. DURBIN ANNUNCIATOR Filed Jan. 5, 1922 Patented Dee. 2l, i925.

Uhii'lhlll STATES l' 1,611,823 parleur orrice.

VERNON' DURBN, F NEV'EON, MASSACHUSETTS, TO THE HOLTZER-CABOT ELECTRC COMENY, OF .ROXBURY, MASSACHUSETTS, A CORPORATION 0F MASSA- CH'SETTS.

ANNUNCATOR.

Application filed January 5, 19522. Serial No. 527,200.

The present invention relates to an improvement in annunciators.

The object of the invention is to improve and simplify the construction ot annunciators in order to reduce the cost of produc tion thereof and in order to increase their efticiency and durability.

To the accomplishment ot these objects the improved aniiunciator ot the present in vention consists in the structure hereinafter describ-ed and particularly pointed out in the claims.

The preferred form ot the .invention is illustrated in the accompanying drawing in which Fig. 1 is a plan view ot the armature; Fig. 2 is a section taken on the line 2-2 Fig. 1 looking in the direction of the arrows; Fig. 3 is a section tak-en on the line 3-3 Fig. 1; and Fig. 11 is a perspective view.

A target lO is mounted on a pintle 11. This pintle is pointed at both ends and at the rear end is supported in a depression in a pintle support 12 which is riveted at 13 to the base plate 14,. rlhe front end of the tar- "i get pintle 11 is supported in an indentation in the front pintle support 15 which is formed of non-magnetic metal attached to the pole pieces ot two magnets hereinafter described. The pintle 11 carries an armature plate 16 which is substantially seinicircular in form having two horns7 one at each side. A projection trom the center of the armature plate upward forms one support for the target-stem 17. The target stem is riveted to the armature plate at two points, one above and the other below the pintle.

The annunciator is provided with two separate electromagnets 2O and 30 both sup ported from the base plat-e 14, having cores which are riveted thereto. The forward ends 21 and 31 of the magnet cores support the pole pieces 22 and 32 which are conca-ved on their sides adjacent to each other on arcs corresponding to the curvature of the armature plate 16. The magnets and 30 are separately energized, the one, as 30, to throw the target into announcing position and the other, as 20, to throw the target into unannouneing position. lhen the magnet 2() is energized it p ulls the armature plate 16 to the posit-ion shown in full lines in Fig. 2, thereby throwing the target 10 into announcing position. When the magnet is energized it pulls the armature plate 16 into the nets 20 and 30 may be separately made and prepared tor assembling; that the arniature plate and target are made of stampings and easily and cheaply riveted together and easily associated with the pintle; further by reason of the tact that the whole structure with the exception of the target, armature plate and pintle may be assembled by simple operations, the one magnet being riveted to both the base plate and the front pintle support in one operation and the other magnet being riveted to the base plate and front pintle support by another operation, the pole pieces being previously riveted to the front pintle support which holds such pole pieces in proper relation to each other; then the target, pintle and armature plate piece may be inserted by springing back the rear pintle support rearwardly to permit the pintle to be inserted in the depression in the front pintle support and in the depression in the rear pintle support. lVhen thus assembled the structure is rigid and the tour wires leading to the magnets may be connected to suitable connectors or leading-in wires.

The annunciator is adapted for use either with direct or alternating current and by reason of the fact that the target overbalances the armature plate when one magnet is energized it will swing the target into its announcing or unannouncing position, in which position it will remain until the other magnet is energized to swing it into unannouncing or announcing position as the oase maybe.

Having thus described the invention, what is claimed is:

1. An annunciator having, in combination, a base plate, two electromagnets supported on the base plate, a pole piece for each mag net, a front pintle support connecting the pole pieces, a rear pintle support consisting of a spring member attached to the base plate, an armature carrying a target and adapted to turn within the fields of the magnets, and a pintle upon which the armature is mounted, the ends ot the pintle being adapted to be received in the 'lient und rem: pintle supports Lifter assembly ot' all the other parts by reason of the yielding out the real' `pintle support` longitudinally of the pntle.

2. An annuncator having, in eoinbimtion7 two separately energized electioinagnets, a base plate connecting the rear ends of the magnets, a frontV pintle support connecting the front ends oli' the 'niugnets, L rear pintle support consisting ot' a forwdi'dly bent sp1-ing nieinbeil attached to the buse plate Lund adapted to move Vlongitudn-Lilly of the pintle posit-ion, and a Vpintle cai'rying a Segmental armature and a target, the. ends of the pintle being received within the pntle supports.

VERNON DURBIN. 

